We have a ton of good restraunts in the DC area. Kentmore, which was
previously mentioned, is a good spot if the grass runway isn't soggy.
Other yummy places include Frederick MD and Sky Bryce (ski lodge) VA on
the west side and a number of excellent seafood places on the Eastern
Shore. Personally, if I were you coming from as far away as you, I'd do
one of the Eastern Shore places to enjoy the local seafood. Kentmore is
good, so is Georgetown although its not waterfront, and so is Cambridge
although it lacks both the waterfront and the atmosphere. (Cambridge is
known for their crab omelets as well as its crabcakes.)

Probably the best stop though that you could do while you are in the
area is Tangier Island. That's to the south east just on the other side
of the Washington sectional out in the middle of the Bay. It's a true
Chesapeake Bay waterman's community which supplements its income by
feeding pilots and other tourists some of the most scrumptious home
cooked seafood imaginable.

Here's a link for the island.
http://www.tangierisland-va.com/

The whole island is walkable in a couple of hours or you can rent bikes
or catch a golf cart ride around town. It's a true Chesapeake Bay
experience. My favorite restraunt is the Channel Marker, with very
reasonable prices for the incredible quality of food. Try the crab
salad if they have it and if not, the crab cakes or softcrabs.

Tangier and Georgetown are both open for dinner as well. Tangier lacks
runway lights though so plan accordingly.

More ideas and details: http://www.100dollarhamburger.com/

The previously posted ADIZ explanation was a good post. Drop me a line
though if you still have any questions about that.

Tailwinds!
Helen